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Finding the Fourth Proportional to 28,629.83, 39,481.02 and 21,841.22

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Solution

The fourth proportional to 28,629.83, 39,481.02 and 21,841.22 is: 30,119.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,629.83 : 39,481.02 = 21,841.22 : x
  2. Step 2: Convert to fraction form
    28,629.83/39,481.02 = 21,841.22/x
  3. Step 3: Cross multiply
    28,629.83x = 39,481.02 × 21,841.22
  4. Step 4: Simplify right side
    28,629.83x = 862,313,446.24
  5. Step 5: Solve for x
    x = 862,313,446.24/28,629.83
  6. Step 6: Final answer
    x = 30,119.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.